And theodore



(No Model.)

P. A. & T. SOHEFPLER.

STEAM ENGINE GOVERNOR.

Patented July 10 N. PETERS, PhoXn-Lilhognphar. Wishmgun. D c.

NITED STATES ATENT Fries.

FREDERICK A. SOHEFFLER, OF ERIE, PENNSYLVANIA, AND THEODORE SCI-IEFFLER,OF PATERSON, NEWV JERSEY, ASSIGNORS TO THE ERIE CITY IRON "WORKS, OFERIE, PENNSYLVANIA.

STEAM-ENGINE GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 386,036, dated July 10,1888.

Application filed December 21, 1887. Serial No. 258,624.

To aZZ whom it may concern.-

Beitk nown thatwe, FREDERICK A. SOHEFF- LER, a citizen of the UnitedStates, residing at Erie, in the county of Erie and State ofPennsylvania, and THEODORE SCHEFFLER, a citizen of the United States,residing at Paterson, in the county of lassaic, in the State of NewJersey, have invented certain new and useful Improvements inSteam-Engine Governors; and we do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to that class of steamengine governors which areknown as shifting eccentric or wheel governors; and it consists incertain improvements in the construct1on of the same, as will behereinafter fully described, and pointed out in the claims.

The invention is illustrated in the accompanying drawings as follows:

Figure l is a side elevation of the governor and the eccentric, with theengine-shaft S in cross-sectiou. Fig. 2 is a vertical section on theline 00 00 in Fig. 1, the shaft S not being shown and the dash-pot Gbeing left in elevation. Fig. 3 is a side view of the eccentric andparts attached thereto. Fig. 4 is a like view of Fig. 3,011 a reducedscale, showing the opposite side and an altcrna'ive construction, aswill be noted herein.

A marks the frame of the governor, which may be a disk on the shaft ofthe engine, or it may be formed on the fly-wheel of the engine, or itmay be a partial disk, as shown in Fig. 1.

B is the eccentric, which has an elongated shaft-opening, b, to permitof its being shifted diametrically across the engine-shaft.

B is a stem extending from the eccentric, and His a cross arm on theopposite side of the eccentric from the stem. These extensions extend tothe shaft-openi ng in the form of a raised boss on one side of theeccentric, as seen in Fig. 4, and when the eecentricisin place they fitin between bosses a a on the frame A, and thus form a guide for theeccentric.

O G are the centrifugal weights, and O O are the weight-arms, which arein the form of (No model.)

bell-crank levers, pivoted at their angle or elbow to the frame A at a.

C G are links which connect the short arms of the levers G O to thecross-arm B, there being pivots at the points 0 c in the levers O O' andat b b in the cross arm 13.

By observing the parts just described, as seen in Fig. 1, it will beseen that an outward movement of the weights 0 C will cause a downwardmovement of the eccentric.

The eccentric B in its shifting movement is guided by the stem B, whichslides in an opening in the extension d of the plate D at the lowerend-of the frame A. On the stem B there is a collar, 1), and a coiledspring, F, which surrounds the stem, has its seat at one end on thiscollar and at the other end on the said extension D. The office of thespring F is to resist the outward movement of the weights 0 C, and itwill be observed that an outward movement of the weights will compressthe spring F.

The plate D is provided with slots (1 (2 through which passbinding-screws d d The plate D has a rearward extension, (1, whichpasses through a slot, a, in the frame A, and above it is a rearwardextension or lug, A on the frame A. An adjusting screw, d", is tappedinto the lug A and passes through the extension (1. WVhen thejam-nuts dare loosened,the plate D may be raised or lowered by turning the adjlisting-screw d", and as the ex tension (1 of the plate D is thelowerseat of the spring F an adjustment of the plate D, as described, willadjust or regulate the tension of the spring F. Ifdesired, the extensiond may be cast solid with the frame and the adj ustable frame-plate D bedispensed with by making the collar b on the stem B movable. This isshown in Fig. 4. When a screw-thread, b, is cut on them, stem 13 andjam-nuts b I) serve the office of the collar 1).

In Fig. 1 the parts of the governor are shown in their normal positions.It will be noted that the weights 0 are extended beyond a vertical linepassing through the fnlcrums of their levers-that is to say, the weightsare held beyond their line of gravity. The result of this arrangement isthat the weights when the governor is in the position shown in Fig. 1exert a gravity force upon' the eccentric sufficicntto counteract thegravity of. the eccentric. We have found that without provision for thuscounter-balancing the eccentric it will drop when in the positionshownin Fig. 1, which position we call the normal position.

At the upper end of the frame is p'aced a dash-pot, G, the piston-stem Gof which is attached to the crossarm Bflwhich is connected with theeccentric. The object of this dashpot is to hold the eccentric againstsudden thrust from the reciprocating parts, and thus prevent afluctuating or vibratory action of the weights. governors of this classfor the same purpose, and governors of this class have been made withWeight-arms in the form of elbow-levers, which are connected with theeccentric by linksas, for example, in Patent No. 191,084, dated May 22,1877, issued'to H. Taborand therefore the following claims must beinterpreted as not claiming these features broadly.

The advantages of our construction over similar constructions heretoforemade are numerous, among which are the following: The eccentric isguided loy-the stem 13 in the opening in the extension d'and the planegroove formed bythe bosses a afland is a much cheaper construction thanwhere special overlapping guides are formed on the eccentric and frame.The spring is a compression -spring, while heretofore extension-springshave been used, and a dash-pot is applied to prevent fluctua' tions ofthe weights, and it also serves in guiding the eccentric.

What we claim as new is as follows:

1. In a steam-engine governor of the class herein named, the combinationof the eccentric B, having an elongated shaft-opening, b, and a stem, B,extending therefrom in aplane passing through the greatest diameter ofsaid opening I), the spring F, coiled on said stem and seated at one endon a collar on said stem and at the other on an extension on the frame,in which said stem is guided, the bell-crank weight-levers C, weights 0on the long arms of said levers, and links 0 connecting the short armsof said levers with the said eccen trio on the opposite side from saidstem.

2. In a steam-engine governor of the class herein named, the combinationof the eccentric B, having an elongated shaft-opening, I), and a stem,B, extending therefrom in aplane passing through the greatest diameterof the said shaft opening, the spring F, coiled on said stem and seatedat one end on acollar on said stem and at the other on an adjustableseat, (Z, in which said stem is guided, the bell- Dash-pots have beenused in crank weight-levers G, weights 0 on the long arm of said levers,and links C connecting the short arms of said levers with the saideccentric on the opposite side from said stem.

3-. In a steam-engine governor of the class herein named, thecombination of the eccentric B, having an elongated shaft-opening, b,and asteln, B, extendingtherefrom in aplane which passes through thegreatest diameter of said shaft-opening, the spring F,coiled on saidstem and having a seat at one end on said stem and at the other end onthe extension d, in which said stem is guided, one of which seats isadjustable, a cross-arm, 13*, extending from said eccentric on the sidethereof opposite the said stem, links 0 pi voted to said crossarm and tothe short arms of the weight-levers O, the said weight-levers O, and theweights 0 on said levers.

4. In a steam-engine governor of the class herein named, thecombination. substantially as set forth, of the eccentric B, having anelongated shaft-opening.b, a stem, B, and crossarm B extending therefromin opposite directions and in a line passing through the greatestdiameter ofsaid shaft opening, a dashpot piston-stem extending from saidcrossarm B in the said diametrical line,a dashpot attached to the frameA to receive said piston-stem, an extension, (1, connected with theframe of the governor, which receives and guides said stem B, a collar,b, on said stem, a coiled spring on said stem B between said collar andsaid extension d, weights 0, bellcrank weight-levers G, and links (3*,connecting the short arms of said levers with said cross-arm B.

5. In a steamengine governor of the class herein named, the combination,with an eccentric adapted, substantially as shown, to be shifteddiametrically on the engine'shaft, of centrifugal weights for movingsaid eccentric, which are on the long arms of bell-crank levers, whichhave their short arms connected with the eccentric by links of suchlength, as shown, that said weights are held beyond their line ofgravity when they are in their normal position, as set forth.

In testimony whereof we affix our signatures in presence of twowitnesses.

FREDK. A. SGHEFFLER. THEO. SOHEFFLER.

WVitnesses as to F. A. Scheffler:

J NO. K. HALLOCK, E. P. SELDEN. WVitnesses as to Theo. Scheffier: PAULDRUQKMULLER, EMIL DOMSCH.

